Another dosing regimen for Pomalidomide involved 21/28 day dosing, as in the current dosing regimen for Lenalidomide. In this trial the recommended dose for phase II testing was determined to be 4 mg, 21/28 d. Clinical response (greater than or equal to a partial response (PR)) was observed in 7/25 (28%) patients. While both regimens seem to be clinically active, it is unclear at present as to which regimen leads to greater immune activation or clinical activity.